oc 打包／继承／多态－一看就明白

oc 封装／继承／多态－一看就明白

镔哥哥就不多说，简单介绍单面：

// Person.h

// 封装继承多态

// Created by apple on 14/12/29.

封装：隐藏内部实现，稳定外部接口.

封装就是定义类定义属性定义方法

#import <Foundation/Foundation.h>

@interface Person : NSObject

//属性封装了setter get方法

@property(nonatomic,strong)NSString *name,*sex;

@property(nonatomic,assign)int age;

-(id)initWithName:(NSString *)name sex:(NSString *)sex age:(int)age;

-(Person *)work;

@end

Person.m

// 封装继承多态

// Created by apple on 14/12/29.

#import "Person.h"

@implementation Person

-(id)initWithName:(NSString *)name sex:(NSString *)sex age:(int)age

{

self = [superinit];

if (self) {

self.name = name;

self.sex = sex;

self.age = age;

}

return self;

}

-(Person *)work

{

NSLog(@"%@正在埋头工作",self.name);

return 0;

}

@end

// Worker.h

// 封装继承多态

// Created by apple on 14/12/29.

继承：子类可以直接复用父类中的成员.子类继承父类所有方法的声明和实现非私有的实例变量以及协议继承是要在.h中声明一下继承具有单根性和传递性

继承就是代码优化公共部分交给父类

#import "Person.h"

@interface Worker : Person

@end

// Worker.m

// 封装继承多态

// Created by apple on 14/12/29.

#import "Worker.h"

@implementation Worker

@end

// King.h

// 封装继承多态

// Created by apple on 14/12/29.

#import "Person.h"

@interface King : Person

@end

// King.m

// 封装继承多态

// Created by apple on 14/12/29.

#import "King.h"

@implementation King

@end

// ViewController.h

// 封装继承多态

// Created by apple on 14/12/29.

多态：不同对象对同一消息的不同响应.子类可以重写父类的方法

多态就是允许方法重名参数或返回值可以是父类型传入或返回

#import <UIKit/UIKit.h>

#import "Worker.h"

#import "King.h"

@interface ViewController : UIViewController

@end

// ViewController.m

// 封装继承多态

// Created by apple on 14/12/29.

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[superviewDidLoad];

Worker *worker = [[Workeralloc]init];

worker.name = @"镔哥哥";

[worker work];//worker可以换为父类型Person

King *king = [[Kingalloc]init];

king.name = @"汉高祖";

[king work];//king可以换为父类型Person

// Do any additional setup after loading the view, typically from a nib.

}

- (void)didReceiveMemoryWarning {

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end

oc 打包／继承／多态－一看就明白

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